---
title: ToolRouter — Use Case
description: Step-by-step guide for a real-world ToolRouter use case with agent-specific instructions.
url: https://toolrouter.com/tools/marketplace-search/use-cases/build-sourcing-watchlist
---
# Build Sourcing Watchlist

Procurement teams and resellers need more than one-off searches. They need a repeatable process that maps which marketplaces cover their target regions, runs structured searches across those sources, and saves compact snapshots they can compare over time. Without this, sourcing stays reactive: you search when you remember, miss windows when inventory appears and disappears, and lose track of which sources you already checked.

By combining `source_coverage` to map the landscape, `search_listings` to sweep active sources, and `watchlist_snapshot` to save the result, you build a monitoring pipeline that turns ad-hoc browsing into systematic sourcing. Each snapshot becomes a data point you can diff against future runs to spot new inventory, price changes, and source shifts.

**Tool:** [Marketplace Search](https://toolrouter.com/tools/marketplace-search)
**Skills:** search_listings, watchlist_snapshot, source_coverage

## Agent Guides

- [How to Build a Sourcing Watchlist with Claude](https://toolrouter.com/tools/marketplace-search/use-cases/build-sourcing-watchlist/claude): Guide for Claude
- [How to Build a Sourcing Watchlist with ChatGPT](https://toolrouter.com/tools/marketplace-search/use-cases/build-sourcing-watchlist/chatgpt): Guide for ChatGPT
- [How to Build a Sourcing Watchlist with Copilot](https://toolrouter.com/tools/marketplace-search/use-cases/build-sourcing-watchlist/copilot): Guide for Copilot
- [How to Build a Sourcing Watchlist with OpenClaw](https://toolrouter.com/tools/marketplace-search/use-cases/build-sourcing-watchlist/openclaw): Guide for OpenClaw
